#13997 3dView: Show active filter name(s) below Z-scale indicator

Adds a new HUD label in the upper-left of the 3D view that reads
"Filter : <name(s)>" whenever a cell, property, or per-view data
filter is active. The label is hidden when nothing is enabled.

Names are joined per the source collection's AND/OR combine mode, and
contributions from different collections are concatenated with ", ".
On Eclipse views the unified RimFilterInViewCollection is used as the
single anchor; GeoMech views aggregate cell and GeoMech property
filters directly.

ApplicationLibCode/ProjectDataModel/RimEclipseView.cpp

@@ -2597,6 +2597,16 @@ const RimPropertyFilterCollection* RimEclipseView::propertyFilterCollection() co
     return eclipsePropertyFilterCollection();
 }
 
+//--------------------------------------------------------------------------------------------------
+///
+//--------------------------------------------------------------------------------------------------
+QString RimEclipseView::activeFiltersDisplayText() const
+{
+    if ( m_filterInViewCollection() ) return m_filterInViewCollection()->activeFiltersDisplayText();
+
+    return RimGridView::activeFiltersDisplayText();
+}
+
 //--------------------------------------------------------------------------------------------------
 ///
 //--------------------------------------------------------------------------------------------------